Coupling



y 1943. s. GUARNASCHELLI Re. 22,309

COUPLING Original Filed Aug. 27, 1941 3a 4 1 j 43 34 w W 31 30 M 35 INVENTOR STEPHEN GUAPNASCHELL/ Reissued May 11, 1943 COUPLING Stephen Guarnaschelll, Mount Vernon, N. Y., as-

Signor to Packless Metal Products Corporation, New York, N. Y., a corporation of New York Original No. 2,301,038. dated November 3, 1942, Serial No. 408,448, August 27, 1941. Application for reissue December 18, 1942', Serial No. 469,463

12 Claims.

This invention relates to couplings and par-.

ticularly to swivel couplings.

It is difficult to prevent leakage from swivel couplings. especially where fluid under pressure circulates therethrough.

This invention has for its salient object to provide a multiple seal coupling so constructed and arranged that leakage therefrom will be reduced to a minimum or entirely prevented.

Another object of the invention is to provide a leakproof multiple seal swivel coupling so constructed and arranged that no packing will be necessary to prevent leakage.

Further objects of the invention will appear from the following specification taken in connection with the drawing which forms a part of this application, and in which Figure l is an elevational view, one-half in section, illustrating a multiple seal coupling constructed in accordance with the invention; and

Fig. 2 is a sectional elevation of one-half of a modified form of coupling construction embodying the invention.

In the embodiment of the invention illustrated in Fig. l the coupling comprises a pair of members III and II adapted to be connectedv into a pipe line. The member Iii is provided with a threaded portion l2 engaged by a nut i3 which has an inward y extending flange or shoulder l4 engageable with an outwardly extending flange IS of the coupling member I2 and adapted to draw the coupling members together.

The coupling member I is provided with a pair of longitudinally extending relatively thin cylindrical sleeves or walls and I! which are adapted to seat against internal cylindrical surfaces It and I9 formed in the member ii. The outside diameters of the sleeves are sl ghtly larger than the inside diameters of the cylindrical surfaces of the walls i6 and i1 and the sleeves are pressed or forced into sealing relation in the surfaces [8 and 19, but are rotatable therein to provide a swivel coupling. Furthermore, the pressure within the coupling is adapted to force the relatively thin walls I6 and I1 into sealing en- In the embodiment of the invention shown in Fig. 2 there is illustrated a coupling comprising coupling members 30 and 3| corresponding with members i0 and H at Rig. 1. These members are held in cooperating relation by means of a nut 32 carried by th coupling member 30 and engaging a flange on the coupling member 3| in the manner above described.

Member 30 is provided as in the other embodiment of the invention, with a pair of relatively thin cylindrical sleeves or walls 33 and 34 which in this instance seat against internal cylindrical surfaces 35 and 36 of an intermediate member 31. The member 31 is carried by the member ii.

The seating of the walls 33 and 34 is facilitated and the seal is insured by collars 38 and 39 which correspond with the collars 20 and 2i in Fig. 1. Spring 40', which engages the collar 38, seats as before against a shoulder 4i on the member 3i. Spring 42 which engages the collar 39 seats against a shoulder 43 formed on the intermediate member 31.

The intermediate member 31 is preferably formed of suitable plastic material having lubricating qualities as, for instance, material having embodied therein graphite or other suitable lubricant.

From the foregoing specification it will be evident that the multiple seal structure provides a tight seal for preventing leakage from the coupling while at the same time providing a swivel construction.

Although certain specific embodiments of the invention have been particularly shown and described. it will be understood that the invention is capable of modification and that changes in the cooperating parts may be made without departing from the spirit or scope of the invention as expressed in the following claims.

What I claim is:

l. A coupling connection comprising a pair of coupling members, each member having a plurality of surfaces of revolution overlapping and in seahng engagement with corresponding surfaces of the other member and resiliently actuated means for forcing said lnterengaging surfaces into close contact with each other.

2. A coupling connection comprising a pair of coupling members, one member having a plurality of longitudinally extending relatively thin cylindrical walls and the other member having cylindrical surfaces dimensioned to receive and to closely engage said walls and resiliently actuated means for forcing said walls into sealing engagement with said surfaces.

3. A coupling connection comprising a. pair of coupling members, each member having a plurality of surfaces of revolution and an intermediate member having a plurality of surfaces of rev-- olution overlapping and in sealing engagement with the surfaces of revolution of said pair of coupling members, said intermediate member being formed of self-lubricating material.

4. A coupling connection comprising a pair of coupling members, each member having a plurality of cylindrical surfaces, an intermediate member having a plurality of cylindrical surfaces overlapping and in sealing engagement with the surfaces of said pair of members and resiliently actuated means for forcing said interengaging surfaces into close engagement with each other.

5. A coupling connection comprising a member having a plurality of longitudinally extending, relatively thin cylindrical walls, an intermediate member having a plurality of inner cylindrical surfaces overlapping and engaging the outer surfaces of said cylindrical walls and a third member having a .plurality of cylindrical surfaces engaging outer surfaces of the intermediate member.

6. A coupling connection comprising a member having a plurality of longitudinally extending, relatively thin cylindrical walls, an intermediate member having a plurality oi inner cylindrical surfaces overlapping and engaging the outer surfaces of said cylindrical walls and a third member having a plurality of cylindrical surfaces engaging outer surfaces of the intermediate member, said intermediate member being formed of self-lubricating material.

7. A coupling connection comprising a member having a plurality of longitudinally extending, relatively thin cylindrical walls, an'intermediate member having a plurality of inner cy lindrical surfaces overlapping and engaging the outer surfaces of said cylindrical walls, a third member having a plurality of cylindrical surfaces engaging outer surfaces of the intermediate member, and resiliently actuated means for forcing said thin walls into sealing engagement with the surfaces engaged thereby.

8. A swivel coupling connection comprising a pair of relatively rotatable coupling members, each member having a plurality of cylindrical surfaces overlapping and in sealing engagement with corresponding cylindrical surfaces of the other member, the outside diameter of the inner cylindrical surfaces slightly exceeding the inside diameter of the outer cylindrical surfaces, and resiliently actuated means for forcing the inner surface into closed contact with the outer surface.

9. A coupling connection for interconnecting sections of a pipe line carrying fluid under pressure comprising a thick walled rigid member having a cylindrical bore therein, a second member having a thin Walled resilient cylindrical sleeve in tight engagement with said bore and rotatable therein, the fluid in said pipe line exerting a pressure on the inside of said sleeve to maintain said tight engagement.

10. A coupling connection for interconnecting sections of a pipe line carrying fluid under pressure comprising a thick walled rigid member having a cylindrical bore therein, a second member having a thin walled resilientcylindrical sleeve in tight engagement with said bore and rotatable therein, the outside diameter of said sleeve slightly exceeding the diameter of the bore, the fluid in said pipe line exerting a pressure on the inside of said sleeve to maintain said tight engagement.

11. A coupling connection for interconnecting sections of a pipe line carrying fluid under pressure comprising a thick walled rigid member having a plurality of cylindrical bores therein, a second member having a plurality of thin I walled resilient cylindrical sleeves in tight engagement with said bores and rotatable therein, the fluid in said pipe line exerting a pressure on the inside of said sleeves to maintain said tight engagement.

12. A coupling connection for interconnecting sections of a pipe line carrying fluid under pressure comprising a thick walled rigid member having a plurality of cylindrical bores therein, a second member having a plurality of thin walled resilient cylindrical sleeves in tight engagement with said bores and rotatable therein, the outside diameter of said sleeves slightly ex ceeding the diameter of the bores, the fluid in said pipe line exerting a pressure on the inside of said sleeves to maintain said tight engagement.

STEPHEN GUARNASCHELLI. 

